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- Title
High-Insulating Nature Induced by the Effect of Nickel Doping in (Ba<sub>0.7</sub>La<sub>0.3</sub>)(Ti<sub>1−x</sub>Ni<sub>x</sub>)O<sub>3</sub> Ceramics.
- Authors
EL Ghandouri, A.; Omari, L. H.; Sayouri, S.; Lamcharfi, T.; El Akili, C.; Elbasset, A.
- Abstract
As a lead-free ceramic, lanthanum-modified barium titanate (BLT) has attracted significant attention among researchers in recent years due to its interesting ferroelectric and piezoelectric properties and insulating behavior, which can be improved by the doping effect. For that, (Ba0.7La0.3) (Ti1−xNix)O3 (where x = 0%, 1%, 3%, 5%, 7% or 10%), denoted as BLTNx, were synthesized via the sol-gel process. The effect of the divalent ion Ni2+ on the structural, microstructural and dielectric properties was investigated by x-ray diffraction (XRD) and Fourier transform infrared (FTIR), Raman, and impedance spectroscopy (IS). Surface morphology analysis is done by scanning electronic microscopy (SEM). Dielectric properties were determined in the ranges 28°C to 400°C and 1 kHz to 2 MHz. The results showed that a low doping amount of Ni (x < 5%) increases the dielectric constant. The sample with x = 5% exhibited, at 400°C, a relatively high dielectric constant (ɛ′ = 2202), the sample with x = 3% exhibited, at 100°C, low dielectric loss (tan(δ) = 0.009), and high insulating character, indicating a suitable material for multilayer ceramic capacitors (MLCCs) and energy storage.
- Subjects
CERAMIC capacitors; DIELECTRIC properties; PERMITTIVITY; DIELECTRIC loss; BARIUM titanate; LEAD-free ceramics
- Publication
Journal of Electronic Materials, 2021, Vol 50, Issue 12, p7198
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-021-09261-4